With the current version of Visual Studio 2017, which is 15.6.5, you have to have really good naming to be able to look at Test Explorer and figure out what your tests actually do:

That’s because the tests are grouped based on their outcome, i.e. whether they’ve passed, failed, or not run at all.

But that’s going to change in Visual Studio 2017, where Test Explorer groups tests based on the more logical hierarchy of project, namespace, class and method:

This is also very handy because you can run a certain group of tests (e.g. tests in a specific class, or tests in a specific namespace), directly from Test Explorer, rather than having to do this by right-clicking the test code and using the context menu (which isn’t very intuitive for newer developers).

This is a small but significant improvement towards making Test Explorer more usable. It is also yet another change that brings Visual Studio closer to ReShaper in terms of functionality.